Envelop-mucilating machine.



No. 629,348. Patonte'b July 25, 899.

n. E; nscusn. ENVELOP IUCILATING MACHINE.

(Application filed June 11, 1898.) (In lodei.) 2 Shani-Shoat I.

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No. 629,348. Y Patanted July 25, I899.

n. E. FISCHER.

EfiVELOP IUBILATING MACHINE.

(Application find. Juan 1!, 1898.) I an: idol.) 2 Shuts-Shut 2.

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UNITED STATES 5 PATENT OFFICE.

ROBERT ERNST FISCHER, or BARMEN, GERMANY;

ENVELOP-MUCILATING MA HINE;

SPECIFICATION forming i of Letters Patent as. 629,348, dated July 25, 1899. Application filed June 11, 1828. Serial No. 683,194. CNo model.)

T0 a-ZZ whom it nary concern:

Be itknown that 1, ROBERT ERNST FISCHER, a subject of the King of Prussia, German Emperor, residing at Barmen, in the Province of Rhenish Prussia, Germany, have invented new and useful Improvements in Envelop- Mucilat'ing Machines, of which the following is a specification.

My invention has reference to machines for mucilating envelop-blanks and the like, and has for its object to provide such a machine in which are combined simplicity of construction and effectiveness in operation and which will overcome the many disadvantages due to the use of the existing machines and increase the capacity.

The invention consists of a mechanism for separating the envelop-blanks individually from the stack, and its general improvement consists in the arrangement of a pair of rotating or otherwise moved brushes adapted to strike the pile of blanks and preventing the upward crease of the flap edges of single envelops.

The invention will hereinafter fully and clearly appear from a reading of the follow ing description, taken in connection with th accompanying drawings, in which Figure 1 illustrates the separating mechanism in a vertical section. Fig. 2 is a plan view thereof. Fig. 3 is a modification of the device, illustrating a varied movement of the brushes.

In the frame 1 of the machine is suitably journaled by bearings 2 the blank receiving and guiding roller 3, which is set in motion by chain-gear 4. This roller is touched on top by a second roller 5, which is rotatably fitted to arms 6, which arepivotally secured to standards 7. Underneath the roller 3 is arranged the drum 8 for guiding the mucilated blanks, and in front of this drum is secured to theframe a curved supporting-table 9, on which are carried the blanks to be gummed: by the mucilage-fountain 10. The blank-stack is put in the machine and rests on a rod 11 and striking-rollers 12 13, of which a number are provided in the manner as shown in Fig. 2. The striking-rollers are driven by chain-gear-21 22.

In order to hold the stack in position, the following means are provided: To the bearranged to secure the stack from behind.

- So far as described the device is not novel either in the general arrangement or in opera tion. My invention consists in improving the operation of the machine, for it often happens that the action of the rollers 12 13, which strike against the bottom level of the stack in order to separate them individually, is insufhcient and the single blanks are not properly carried forward to the receiving-rollers3 5. To prevent this drawback, I fit the rear gages 18 at their lower ends with an elastic material,

as india-rubber or the like, so as to gain an elastic abutment for the forwardly-driven blanks. I further arrange between the receiving-rollers 3 5 and the blank-pile a pair of brushes 23. These brushes are fixed to a shaft 24, which is journaled in bearings 25 of the machine and driven in the direction of the arrow from the roller-shaft 26 by means of toothed gear 27 28. The brushes in rotating are arranged to strike the inner vertical pile-surface from above to'below, removing thus the bur which is produced by cutting the pile out, so that it is now impossible for a single blank to slip forward earlier than its fellow below it and that its flapedges may be creased upward. By this means no disturbance occurs in the machine, and the single blanks are properly guided into the receiving-rollers 3 5. The brushes 23 may, it is manifest, be also otherwise moved, as just described.

In Fig. 3 I have shown a modification of the brushes. Here they are fitted to a bar 29,

which is vertically guided by slotted standards 30. A lever. 31, pivoted to the standard 7, imparts, when correspondingly moved, vertical motion to the bar, so that the brushes may strike the pile in traveling up and down.

The blanks may be carried down from the roller 3 to the Way 9 in difleront manner. The l and located between the receiydng-roller and mostly used consists in furnishing the blanks I the pile, for Wiping the face of a pile of blanks bya pair of endless bands, which tangent the in order to prevent more than a single blank 15 circumference of roller 3 and touch the way being fed at atime, substantially as specified. 9, traveling over it. In testimony that I claim the foregoing as Having now fully described my invention, my invention I have signed my name in the I declare that What I claim is presence of two subscribing Witnesses.

In an envelop-mucilating machine,the com- 1 bination of means for supporting a pile of ROBERT ERNSFL FISCHER blanks, means for feeding the blanks singly Witnesses: to the receiving-rollers, and means consisting R. E. J AHN, of a brush movable across the face of the pile OTTO KoNIG. 

